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Diesel pump pressure switch

Engine management light coming on when under load have been told it could be fuel pressure have already blocked off egr valve

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  • Cars & Trucks Master
  • 1,727 Answers

Have you checked what code(s) are causing the light to come on or are you just going to guess what's causing it to come on ??? have the engine control module scanned for trouble codes

Posted on Nov 09, 2014

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: expert van 2.0 hdi engine runs lovely until you

Hi You need to get the ecu checked for fault codes if there are none it is possibly low fuel pressure you should allso check this have you changed the fuel filter or opened any fuel lines this could introduce air
which will lower fuel pressure.Good luck Chris.

Posted on Mar 24, 2009

  • 1 Answer

SOURCE: trouble with my 2006 chevy silverado 3500 duramax diesel

I had the same problem it turned out to be the injector pump witch gm covered it.

Posted on Dec 29, 2008

  • 66 Answers

SOURCE: toyota hiace GS300 d4d diesel 2053 engine stops whilst ideling

you have a leak in one of your fuel lines . but its not be a outward leak its sucking air .first look at all of the steel lines. if no problem found go to all the rubber lines you are sure to find the problem

Posted on Jan 25, 2009

alicantecoli
  • 22133 Answers

SOURCE: 1996 VW polo diesel fuel pump

easy to change its on top of the injector pump ,but you may have a antitheft shroud around it which means removing the pump from the engine to get get the shroud off

Posted on May 07, 2009

  • 61 Answers

SOURCE: I changed EGR valves, selinoid, sensors, and even

go to auto zone or someone with a scan tool to find out what codes are stored on the computer in the car

Posted on Jul 30, 2009

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1 Answer

Diesel engine


no DTC posted, wow , nor year. and which Diesel.
I guess you need to understand how EFI works
in a nut shell, the EFI can compensate for weak parts.
including a weak pump.
that magic is called closed loop.
but on newer cars, the pump is monitored for proper pressure,
this is a godsend.
if the pressure drops, IT WILL GET Worse.
Great information to learn just before a 3000 mile trip, right?"
it's and early warning,,,
and can be caused by many things.
1: love voltage to pump, (bad wiring)\
2: pump weak.
3:: fuel pressure regulator stuck open (or closed of pressure too high
you never gave DTC so cant advise ,)
4: crushed fuel lines, from driving off road. etc.
some cars uses different Diesel injection systems in different countries.
and country not stated.

May 25, 2013 | Suzuki Grand Vitara Cars & Trucks

2 Answers

My 93 rodeo acts like it's running out of gas when driving. Starts and idles just fine


Someone would need to check the fuel pressure with a gauge and replace the fuel filter to eliminate the pump. Assuming the check engine light is not on, it could be a vac leak or other problem.
The most common problems are a leaking EGR valve or faulty throttle position sensor, but those components should make the check engine light come on if they fail.

Jan 04, 2013 | 1993 Isuzu Rodeo

1 Answer

Kia sedona 2003. Engine management light comes on briefly when under load.


FUEL PRESSURE SHOULD CHECKED AND IF IT IS LOW THE PUMP WILL NEED REPLACED.OTHERWISE I WOULD BE CHECKING FOR A EXHAUST RESTRICTION,BEST METHOD IS TO SCREW A PRESSURE GAUGE INTO 02 PORT BETWEEN ENGINE AND CAT THERE SHOULD NEVER BE MORE THAN 3PSI.ANOTHER METHOD AND LESS DETERMINING IS FEEL THE EXHAUST PRESSURE OUT TAIL PIPE WHILE SOMEONE OPENS THROTTLE.COMPARE THIS FELT PRESSURE TO A KNOWN GOOD CAR.THE SOURCE OF YOUR SYMPTOM COULD BE MANY THINGS ,BUT I WOULD START WITH THE TWO MENTIONED.

Dec 01, 2011 | Kia Sedona Cars & Trucks

1 Answer

Jaguar x type 2.0 turbo diesel 2006. Car was smoking really badly in all gears black like sut, really rough idling. And sounds like it has breathing problems almost like it's not running on all cylinders....


I have exactly the same problem on my x type 2.0 turbo diesel 2006. Problem occurred all of a sudden while driving, was told to change turbo and EGR valve, but same problem. Took to dealers and they advised because it has so many error faults coming from the engine it would be cheaper to change the engine. Will be trying this unless I can get some other advise.

Apr 03, 2011 | 2006 Jaguar X-Type

1 Answer

01 focus,2.0 DOHC ZT,Crapping out under acceleration or under load on hills,Changed fuel pump,Checked for vaccuum leaks,No codes no light,I have a streaming reader and everthing appears to read right.I am...


Under a load or uphill,would suggest that a high vacuum signal was involved. So think EGR Valve. I know you got no codes. This is an exercise in logic.
A misfire will present it'self going up hill or loading the engine. e.g. hard on the gas
What has no sensor or won't set a code easily. Vacuum leaks,air filter,all air intake ducting,MAF Sensor,Throttle Position Sensor and don't forget those really small EVAP Leaks,most people never heard of.
Is the converter partially blocked?
O2 Sensors switching properly?
Fuel pressure,under a load? New fuel filter?

May 28, 2010 | 2001 Ford Focus

1 Answer

My truck 5.9 cumming diesel turbo will not start no pressure out of valve. im thinking its the fuel pump. but want to know does it have just one. some have told me a transfer pump some say it has a low...


It has a fuel transfer pump (low pressure) May be mounted on the engine block next to fuel filter housing or it could be in the tank, depending if it has been updated, Came from factory on block, but later updated to intank> Fuel transfer pump pressure should be at least 8 psi> the injection pump then raises pressure to open injectors. May have to replace transfer pump first or you could possibly have a plugged fuel filter. Do you have any smoke coming from tailpipe while cranking?
Injection pump failure is a common problem. The diafragm breaks inside the injection pump if you run low transfer pump pressure> This causes the timing to be off thus no start. Really best to have it towed to experienced diesl tech. He can get you the right answers rather than just replacing parts, Can get in your wallet real quick,

Feb 26, 2010 | 2000 Dodge Ram 3500

1 Answer

Check engine light on


Those codes tell me fuel system is to lean on both sides. Yes those may cause low fuel but also fuel pump, fuel pressure regulator, and others may cause these symptoms. First I'ld check the fuel pressure and see how well she holds. If fuel doesn't reach proper pressure it's your fuel pump. If it reaches proper pressure but doesn't keep it for long it's the pressure regulator. 02 sensors, should be another trouble code coming if if problem. egr valve, i have no idea how to check without catching up on some reading. MAFS, mass air flow sensor, will cause this. Double check to make sure the sensor is inserted correctly and no loose connections. If put in backwards it can cause bad readings. If there is a crack in the duct work before or after the MAFS or a loose fitting it can be causing a missreading and causing your problems.

Feb 21, 2010 | 2002 Ford Ranger Regular Cab

1 Answer

Replace fuel pump on 03 Ford F350 diesel


simple : obtain replacement pump from parts provider (no used stuff)

Now help me out here: thats the year they were bolted to the pass side front of engine
and not inside the tank right? (better go look to see for sure)

using a tube wrench unscrew the fuel lines (i use large wire nuts to temp block off fuel leakage)

with a 12 mm wrench undo the two side bolts holding the pump to block

wiggle pump it should come straight off

clean mounting place on block with solvent let dry

silicone back (or use gasket that comes with pump ) of pump

apply pump to block (depending on where crank stopped you may have some tension on arm you will have to overcome to get flange to meet block )

use locktite (blue)or simmiliar thread lock on bolts retighten firmly but not hang up the dog tight

use light grease or vasolene on tube connections don't try to tighten dry

Now the fun part your diesel now has air in the fuel system

there are two ways to remove this ( hard and harder)
your choice here are both methods

loosten the fuel supply line for #8 injector ( I did not say remove) 1 full turn ought to be enough

crank engine 30 seconds only
wait 5 minutes for starter to cool down
crank engine 30 sec again
did it start but runs rough while it's still running tighten #8 injector (caution fuel under high pressure)
engine smooth out good your lucky
engine did not start yet
wait 5 minutes
crank engine 30 sec again
start yet
if so tighten #8 injector up

Now here's something I've done to my diesel to make this much less a hasstle

trace fuel line as it comes up from pump
obtain a small low pressure electric fuel pump and a two short pieces of fuel line
and a few clamps

use tube cutter and cut fuel line just before it bends to go in filter
deburr edges
slide tube and clamps over pipe (both sides)
insert pump observe flow arrrow towards filter

the wires of pump can be stretched over to #1 battery terminals

now any time you change a filter or open your fuel system for any reason
all you need do is connect pump to battery
open sharader valve on top of filter for a few min
and start truck as normal
then disconnect wires and stow away for another day

Jun 29, 2009 | 2003 Ford F350 Super Duty DRW SuperCab

1 Answer

Toyota Surf Diesel starting problem


Injectors could be blocked but i would go with an injector pump or fuel pump.

Jan 20, 2009 | 1995 Toyota 4Runner

1 Answer

Trouble with my 2006 chevy silverado 3500 duramax diesel


I had the same problem it turned out to be the injector pump witch gm covered it.

Jun 12, 2008 | 2006 Chevrolet Silverado 3500

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